Study Study Study

I have been studying my butt out for my exam but yet.....I still fail..I just dont know wat to do...am I just stupid or wat...I really need help....I have friends out there who support me all e way...but when I get to know abt my result..I just felt like QUITTING SCHOOL..Do u think I should just quit sch n go for NS or do u think I should just continue n suffer more.???